function HttpGet(url, callback) {
	var xhr = new XMLHttpRequest();
	xhr.onload = function() {
		console.log(this.responseText);
		var obj = JSON.parse(this.responseText);
		callback(obj);
	};
	xhr.onreadystatechange = function() {
		console.log(this.readyState);
	};
	xhr.open("get", url, true);
	xhr.send();
}